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Originally Posted by theiceman
think about ohms law,,, how much current is needed to power an led ... and how much resistance is in an led...
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You sound confused.
Did you read the link?
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For example, in the circuit below, a battery can be used to induce an electric potential across the capacitor. This will cause equal but opposite charges to build up on each of the plates, until they're so full they repel any more current from flowing. An LED placed in series with the cap could provide a path for the current, and the energy stored in the capacitor could be used to briefly illuminate the LED.
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The diagram is of a circuit that powers an LED bulb.
Why does it have a resistor?
B/c that is the thing being powered!
That is the entire point of the stupid circuit. Duh.